It's well known in fields of information visualization that curved flowchart connections are easier for the human eye to follow than sharp angled connections, and a default of Bezier curved device lines (with the option to revert to anged lines) would improve the visual aesthetic and clarity of the device connector grid.

I know this is an old request, but I wanted to throw my support behind it. I find that I periodically have to spend time managing wires in dense projects to try to make sure they dont overlap for readability. Having used other editors like substance designer where they have an option to toggle between square or curved connectors, I find that curved connectors are more readable because they tend to overlap less and are therefore easier to understand what they are connecting.